Can closure and method of forming same



5 Sheets-Sheet i 2 mAw m a w mm A AQ n a n o F. in B M m m M A April 25,1967 P. F. CATALANO ETAL CAN CLOSURE AND METHOD OF FORMING SAME FiledJune 6, 1962 VM M 3 Sheets-Sheet 2 INVENTORS L. QMO

OLUSK\ ATTORNEYS I April 25, 1967 P. F. CATALANO ETAL CAN CLOSURE ANDMETHOD OF FORMING SAME Filed June 6, 1962 I PHILIPFCATA ANTHONY Gems BYmm, m, /M&

April 25, 1967 P. F. CATALANO ETAL 3,315,839

' CAN CLOSURE AND METHOD OF FORMINGSAME Filed June 6, 1962 5Sheets-Sheet 3 I-xe. l0

INVENTORS PmupFCATALANo @YAMTHOHV eaaowszl M PMJZQMQ ATTORNEYS UnitedStates Patent C 3,315,839 CAN CLOSURE AND METHOD OF FORMING SAME PhilipF. Catalano and Anthony Grabowski, Chicago, Ill.,

assignors to Continental Can Company, Inc., New York,

N .Y., a corporation of New York Filed June 6, 1962, Ser. No. 200,534 16Claims. (Cl. 220-67) The invention relates generally to the art of canmaking and resides in the provision of a novel can closure and method offorming the same, while the invention is applicable to the manufactureof cans wherein the bodies are of seamless, drawn type, it preferably isapplied in the manufacture of cans including bodies of steel, aluminumor aluminum alloys having very thin walls, say of 0.004 to 0.011 inch,for example, and including welded side seams wherein the thickness ofthe metal at the weld corresponds generally to the thickness of themetal elsewhere in the body.

In the manufacture of cans, it is common practice to secure metalclosures on the metal bodies by the well known double rolled seamingaction, edge portions of each can body and its closure being rolledtogether in the formation of the double seam. In this conventionalpractice each can body is provided with outwardly turned flanges at itsend extremities, and each closure includes a central countersinkpresenting a chuck wall which is insertable into an end of the can body,and an outwardly extending portion for overlyinga body flange andadapted to be rolled with the body flange into the sealing seamstructure. The bodies commonly have lock and lap side seams the lockportions of which are composed of interlocked body hooks, thuspresenting four thicknesses of metal, and the lap portions of which aredisposed at the ends of the side seam and present two thicknesses ofmetal which are rolled into the sealing seam structure.

Conventional side seam structures of the character stated usually aresolder bonded, and since the flanging of the bodies is accomplishedafter the solder bonding, the flanging operation often results in arupturing of the bond in the lap seam portions intended to be rolledinto the closure seam structures, and leaky cans are thus formed. Itsometimes happens also that by reason of the turning of non-uniformlengths of the body metal in the flanging operation, or in the chuckingof the bodies incidental to the formation of closure seams, cans ofnonuniform height will be provided. Also, when attempts have been madeto form flanged can bodies from thin stock, such as double rolled tinplate, difiiculties such as rupturing and leakage have been encounteredbecause this stock cannot be flanged satisfactorily, the flanges havingwhat is known in the industry as H-grain and circumferentialbrittleness.

A primary object of the present invention is to avoid the problems abovereferred to and provide a novel can closure wherein interlocking sideseams and the rolling together of closure and body edge portions isentirely eliminated, thus providing for a marked saving of metal as aresult of the elimination of body flanges and interlocked side seams,without sacrifice in the objective of providing wholly practical closureseals, even against egress of relatively high pressures from within thesealed cans.

Another object of the invention is to provide a novel closure of thecharacter stated wherein the closure seal may embody a sealing compound,or optionally, a metalto-metal adhesive bond, providing not only for thedesired sealing purpose but also adding to the structural strength inthe finished seam.

A further object of the invention is to provide a novel closure of thecharacter stated wherein provision is made for adding rigidity to theseam, providing a greater strength against relatively high sealed-inpressures, and also facilitating application of the closure piercingtypes of can openers, by reason of the inclusion in the closure of anopener engaging ledge of practical dimension and strength.

Another object of the invention is to provide a closure of the characterstated in which the can body is devoid of an outwardly turned flange andhas a generally cylindrical end extremity over which the annular channelof an end closure is receivable and which merges downwardly into aninwardly turned bead presenting a horizontal seat or shoulder merginginwardly and downwardly into an outwardly and downwardly flared andcurving wall portion finally merging into the main upright body wall ofthe can body.

Still another object of the invention is to provide a can body of thecharacter stated wherein the body structure is the same at each of itsends, is not only devoid of outwardly turned end flanges but also iseither seamless or provided with a side seam which does not departsubstantially from the thickness of the metal of the body wall stock,and wherein the main body between its curving end portion flares iscircumferentially corrugated uniformly throughout its height forproviding form and internal pressure retaining rigidity.

A further object of the invention is to provide a novel closure of thecharacter stated wherein the can body is formed in the mannerhereinabove stressed and in which the can end closure includes a centralclosure portion surrounded by an upstanding downwardly opening channeldefined by an inner chuck wall connected with the central closureportion through a chuck radius and an outer skirt or seaming wall whichis longer than the generally cylindrical end extremity of the body andwhich is connected with the chuck wall through a channel radius, saidcentral closure portion firmly resting on the horizontal shoulder of thebody about an annulus joining with the chuck wall through said chuckradius, and the. seaming wall portion remote from the channel radiusbeing turned snugly under and locked against the body at said shoulderwith the generally cylindrical body end extremity tightly embracedbetween the chuck wall and the seaming wall and conforming in shapethereto and with the channel radius firmly engaged over the end edgeextremity of said generally cylindrical body end extremity.

A still further object of the invention is to provide a novel canclosure of the character stated wherein the closure seam is sealed by asealing medium in the closure channel and engaging between the opposingfaces of the generally cylindrical body end extremity, the chuck Walland the seaming wall.

Still another object of the invention is to provide a novel can closureof the character stated wherein the closure seam is sealed by a seambonding adhesive in the closure channel and engaging between theopposing faces of the generally cylindrical body end extremity, thechuck Wall and the seaming wall.

A further object of the invention is to provide a novel can closure ofthe character stated wherein the end closure seaming wall portion remotefrom the channel radius carries an outwardly turned reinforcing hernwhich is engaged in shape conforming closure locking contact under thehorizontal shoulder on the body.

Still another object of the invention is to provide a novel can closureof the character stated wherein the end closure seaming wall portionremote from the channel radius carries an inwardly turned reinforcinghem which is engaged in shape conforming closure locking contact underthe horizontal shoulder on the body.

A further object of the invention is to provide a novel method offorming an end closure for a metal can having a body devoid of a flangeat its end extremity, said extremity terminating in a generallycylindrical portion merging downwardly into an inwardly turned beadpresenting a horizontal shoulder merging inwardly and downwardly into anoutwardly flared portion, with a closure having a central closureportion surrounded by an upstanding downwardly opening channel definedby an inner chuck wall connected with the central closure portionthrough a chuck radius and an outer seaming wall connected with thechuck wall through a channel radius; said method comprising placing theclosure over the body end extremity with the chuck wall closelytelescoped within said end extremity and the central closure portionfirmly seated on the horizontal shoulder, and turning the seaming wallportion remote from the channel radius under and against the body at thehorizontal shoulder to lock the channel firmly over the body endextremity and pressing the chuck wall and the seaming wall into sealingand shape conforming contact against opposite sides of the body endextremity while conforming the turned seaming wall portion to the bodyat and adjacent to the horizontal shoulder engaged thereby.

Another object of the invention is to provide a method of the characterstated including the provision on the closure seaming wall portionremote from the channel radius of a reinforcing hem and the reshaping ofthe hem against the body at and adjacent the horizontal shoulder duringthe securing and locking of the closure on the body.

A further object of the invention is to provide a can closing andsealing method of the character stated including the step of sealing theclosure seam by provision of a sealing medium engaging between theopposing faces of the generally cylindrical body end extremity, thechuck wall and the seaming wall.

A still further object of the invention is to provide a can closing andsealing method of the character stated including the step of sealing theclosure seam by provision of a seam bonding adhesive engaging betweenthe opposing faces of the generally cylindrical body end extremity, thechuck wall and the seaming wall.

With the above and other objects in view that will hereinafter appear,the nature of the invention will be more clearly understood by referenceto the following detailed description, the appended claims and theseveral views illustrated in the accompanying drawings.

In the drawings:

FIGURE 1 is a side elevation illustrating a complete can formed inaccordance with the invention, top and bottom end closures being afixedthereon.

FIGURE 2 is an enlarged fragmentary vertical cross section through oneside wall of the can body, the bottom of the can body being confined ona supporting bed plate and a top end closure being initially appliedover the generally, cylindrical upper end extremity of the body beingdropped onto the can body and resting on the horizontal seat shoulderprovided thereon.

FIGURE 3 is an enlarged fragmentary sectional view illustrating thesecond stage of the securing of the end closure shown initially appliedin FIGURE 2, the application of the chuck and the seaming rollconforming the seam chuck wall and the seaming roll of the closure toshape with the end extremity of the body wall tightly conformed betweenthem, the lower, inwardly hemmed extremity of the seaming wall beinginitially contacted with the body in the process of being looked underand conformed to the body shoulder and the portions thereadjacent.

FIGURE 4 is a view similar to FIGURE 3 and illustrating the completionof the locking-on of the cover and the reshaping of the inwardlydirected reinforcing hem thereof.

FIGURE 5 is a fragmentary sectional view illustrating 4 the interlockingchuck and seaming roll and the completion of the closure seamtherebetween.

FIGURE 6 is a fragmentary sectional view of a plurality of can endclosures of the form shown in FIG- URES 2 through 5, said closures beingshown in nested, stacked relation.

FIGURE 7 is a fragmentary sectional view corresponding to the initialclosure mounting illustrated in FIGURE 2 and showing a modified form ofclosure including an outwardly and upwardly directed edge curl.

FIGURE 8 is a fragmentary sectional view similar to FIGURE 3 andillustrating the seam conformation between the chuck and the seamingroll and the initial reshaping of the cover edge curl into an open,outwardly directed hem.

FIGURE 9 is a fragmentary sectional view similar to FIGURE 4 andillustrating the completion of the looking on of the cover and thereshaping of the outwardly directed reinforcing hem thereof.

FIGURE 10 is a fragmentary sectional view similar to FIGURE 6 andillustrating can ends of the form shown in FIGURES 7, 8 and 9 in nested,stacked relation.

In the example of embodiment of the invention herein disclosed, theimproved closures are provided on an improved can body best shown inFIGURES l and 2. The body generally designated 5, as shown in FIGURE 1,has top and bottom end closures respectively designated 6 and 7 appliedthereon. At each body end extremity, there is provided a generallycylindrical portion 8 presenting an edge extremity 9, upwardly ordownwardly as the case may be. Each generally cylindrical portion 8merges through an inturned bead 10 with a horizontal seat or lockingshoulder 11, and each such horizontal seat or shoulder merges through aninwardly, downwardly and then outwardly turned portion 12 into anoutwardly curved body flare 13 which in turn merges at 14 into the mainbody portion of the can body generally designated 5. Between theoutwardly curving flares 13, the main body is uniformly andcircumferentially corrugated to give to the very thin wall structure of0.004 to 0.011 thickness the desired rigidity and strength for retainingsealed-in pressures for which the can is designed.

The ends or covers for use in the form of the invention shown in FIGURES2 through 5 are illustrated in nested, stacked relation in FIGURE 6.Each such can end or closure includes a central closure portion 11 and asurrounding upstanding and downwardly opening channel generallydesignated 17. The channel comprises a chuck wall 18 merging through theinner chuck radius 19 with the central closure portion 16, and throughthe channel radius 20 with the seaming wall or skirt 21. The seamingwall or skirt 21 is longer than the chuck wall and is provided at itsextension beyond the chuck wall depth with an inwardly turned hem 22. Itwill also be apparent by reference to FIGURES 2 and 6 that each can endchannel also is equipped with a sealing compound or bonding adhesive asindicated at 23.

The manner of forming the closure of FIGURES 2 through 5 isprogressively illustrated in said figures. It will be apparent byreference to FIGURE 2 that the lower end extremity of the can body 5 .issupported and confined at 24 on the bed plate 25, and in said figure,the can end or cover is shown ashaving been dropped onto the upper endextremity of the body and resting on the horizontal shoulder 11, as at26. Relative movement between the bed plate 25 and a chuck roll 27 isthen brought about to place the chuck roll base 28 against the centralclosure portion 16 of the can end or cover and the chuck wall 29 of theroll within the chuck wall 18 of the can end, as shown in FIGURE 3. Withthe chuck roll thus placed, a seaming roll 30 interlocked at 31 with thechuck roll 27 in the well known manner is moved into contact with theseaming wall or skirt 21 of the can end, said seaming roll including theusual seam pressing and conforming wall 32 and a can end seaming wallreshaping and locking portion 33. The cooperation or moving together ofthe seaming roll and the chuck roll serves to tightly conform the canend walls 18 and 21 and the can body wall portion 8 embraced betweenthem in the manner clearly illustrated in FIGURE 3. The seaming wallreshaping and locking portion 33 of the seaming roll is so formed as tobe effective during the rolling of the seam by the seaming roll as tofirst bring the hem 22 into engagement with the bead It as at 34 andturn the hem inwardly as at 35, and then to reshape the hemprogressively to conform and lock the same under the horizontal shoulder9 as illustrated in FIGURE 4. In the process of reshaping and lockingthe cover skirt reinforcing hem in the manner described, and as shownprogressively in FIGURES 3 and 4, the cover channel is drawn downwardlyto firmly seat the inner chuck radius 19 on the horizontal shoulder,pulling the seaming wall or skirt 21 downwardly and putting the same andholding the same in tension over the end extremity 9 of the can bodywall portion 8, as shown in FIGURE 4.

It will be observed by reference to FIGURE 4 that not only is the canend or cover reinforcing hem 22 conformed to and securely locked underthe bead 1d and the horizontal locking shoulder 9 thereof, but the rawmetal edge of the hem is so enclosed within the seam structure as toavoid exposure thereof to the elements. In the process of forming theseam as herein described, the sealing compound or bonding agent 23 isdistributed in the scam in the manner illustrated in FIGURES 3 and 4,serving to efficiently seal the seam when mere sealing compounds areemployed, and to both seal and provide for an efiicient bonding of theseam and its components when a bonding adhesive is employed.

In the form of the invention illustrated in FIGURES 7 through 10, canends or covers of the form illustrated in FIGURE are employed. These canends are similar to the covers previously described except for the factthat they are equipped at the downwardly and outwardly flaringextremities of the downwardly opening channel with an outwardly andupwardly turned curl 37, rather than the inwardly turned hem structureshown in FIG- U-RE 6. In other words, each of these modified can endsincludes a central closure portion 38 surrounded by an upstanding anddownwardly opening channel 39, said channel comprising a chuck wall 40merging through an inner chuck radius 41 with the central closureportion 38, and through a channel radius 42 with a seaming wall or skirt43, which as in the previous form, is longer than the chuck wall and isprovided at its extremity or extension beyond the chuck wall depth withthe beforementioned curl 37. A sealing compound or bonding adhesive 44preferably is applied in the can end channel as illustrated in FIGURE 7.

These modified forms of can ends or covers are applied over can bodieswhich are identical in structure to those previously described, eachincluding a generally cylindrical wall portion 45 at each end extremityand presenting an edge extremity 46, and each said generally cylindricalportion 45 merges through an inturned head 47 with a horizontal seat orbody shoulder 48, and each said shoulder 48 merges through an inwardly,downwardly .and then outwardly turned portion 49 with the respectiveoutwardly curved flare 54] which in turn merges into the main corrugatedbody portion, as previously described.

In FIGURES 7 to 9, progressive steps in the formation of the seam areshown, and it is to be understood that the lower extremity of the canbody will be supported and confined in the manner previously described,and as shown inF-IGUR-E 2.

In FIGURE 7, the can end is shown as having been dropped onto the upperend of the can body and resting on the seat or horizontal shoulder asindicated at 51. The chuck roll 52 is now brought into contact in themanner previously described to present its base 53 against the can endcentral portion or countersink 38, as shown in FIGURE 8, and the chuckwall 54 of the roll within the can end chuck wall The cooperating andinterlocking seaming roll 55 includes a shaping wall portion 56 which ismodified as necessary to provide for the progressive reshaping of thecan end seaming wall and its extremity and its curl 37, as will beapparent by reference to FIGURES 8 and 9. The initial reshaping of thecurl is shown at 57 in FIGURE 8, and the co mpleted reshaping of thecure in the form of an outwardly turned reinforcing hem and thereshaping and locking of the seam under the horizontal bead shoulder 48is shown at 58 in FIGURE 9.

It is understood that in both of the herein disclosed forms of theinvention, namely that illustrated in FIG- URES 2 through 5, and thatillustrated in FIGURES 7 through 9, the reshaping and locking of thereinforcing hem under the horizontal shoulder 9 or 48 serves to draw thecan end channel downwardly to firmly seat the chuck wall radius 19 or 41against the horizontal shoulder and the channel radius 20 or 42 firmlyagainst the end extremity of the can body, with the seaming wall 21 or43 of the closure seam held in tension by the firm locking of thereinforcing hem under the horizontal shoulder of the bead in the mannerstated.

The novel can body, closure and method of forming the same disclosedherein have provided very notable advantages, some of which are hereinenumerated.

The employment of the fiangeless body structure, also devoid ofinterlocked side seaming serves to provide great savings in metal.

The particular form of the body with its flangeless and generallycylindrical end portion 8 or and the inwardly directed bead 12 or 49serves to facilitate introduction of fill, and also to prevent rollingof fill portions into the seam structure with the result of theprovision of faulty seams. The smoothly rolled bead serves to facilitateentry of the fill, and the raw metal edge at the end extremity of thebody will serve to cut through fill tending to hang over the edge inposition for interfering with the closure application.

The particular form of the seam structure provides for secure sealingand seam strength Without the necessity of the interrolling of flanges.It will be apparent by reference to FIGURE 1 that the seam structuresare so formed and positioned as to provide no projection outward beyondthe mean body diameter. This arrangement provides for more compactstorage and casing, and less damaging of the can ends by engagement ofend seam against end seam.

The particular hem reinforced seam structures also provide secureshoulder means against which to anchor opening devices, either of therotary type, or the fulcruming, end piercing type.

The ends or closures of the type shown in FIGURES 7 to 10 can beproduced by a single operation employing present standard end presses,by simply designing the die to produce the end closures in the formingillustrated in FIGURES 7 and 10.

In the making of the closures of the form shown in FIGURES 2 and 6 therewould be a first stamping out of the end closure, and in a secondoperation the bending over of the closure to form the initially hemmededge thereon.

While preferred example disclosures of the closure, body and seamstructures and the method of forming the closure have been described indetail herein it is to be understood that variations in said structuresand the steps in said method may be made and practiced without departingfrom the invention as defined in the appended claims.

What is claimed is:

I. In a metal container, a generally cylindrical body having a generallycylindrical end portion terminating endwise in a raw metal edge, saidgenerally cylindrical portion merging into an inwardly turned beadpresenting a horizontal shoulder in turn merging inwardly and in adirection generally axially away from said raw metal edge and into anoutwardly and longitudinally flared and curving wall portion finallymerging into the main generally cylindrical body, a closure having acentral closure portion and a surrounding upstanding downwardly open ingchannel defined by an inner chuck wall connected with the centralclosure portion through a chuck radius and an outer seaming wall whichis axially longer than the chuck wall and the generally cylindrical endportion and which is connected with the chuck wall through a channelradius, said central closure portion firmly resting on said shoulderabout an annulus joining with the chuck wall through said chuck radius,with the seaming wall portion remote from the channel radius turnedsnugly under and locked against the body shoulder in a manner holdingsaid seaming wall in tension and the closure firmly against said rawmetal edge and on said shoulder with the generally cylindrical body endportions tightly embraced between the chuck wall and seaming wall andconforming in shape thereto and with the channel radius firmly engagedover the raw metal edge.

2. A closure structure as defined in claim 1 wherein the seaming wallportion remote from the channel radius carries a reinforcing hem whichis engaged in shape conforming closure locking contact under the bodyshoulder.

3. A closure structure as defined in claim 1 wherein the seaming wallportion remote from the channel radius carries an inwardly turnedreinforcing hem which is engaged in shape conforming closure lockingcontact under the body shoulder.

4. A closure structure as defined in claim 1 wherein the seaming wallportion remote from the channel radius carries an outwardly turnedreinforcing hem which is engaged in shape conforming closure lockingcontact under the body shoulder.

5. A closure structure as defined in claim 1 wherein the seaming wallportion remote from the channel radius carries a reinforcing hem whichis engaged in shape conforming closure locking contact under the bodyshoulder, and there also being included a seam sealing medium in theclosure channel and engaging between the opposing faces of the generallycylindrical body portion the chuck wall and the seaming wall.

6. A closure structure as defined in claim 1 wherein the seaming wallportion remote from the channel radius carries a reinforcing hern whichis engaged in shape conforming closure locking contact under the bodyshoulder, and there also being included a seam sealing and bondingadhesive in the closure channel and providing a metal to metal bondbetween the generally cylindrical body portion and the chuck and seamingwalls between which it is embraced.

7. In a metal container, a generally cylindrical body having at each endthereof a generally cylindrical end portion terminating endwise in a rawmetal edge, each said generally cylindrical portion merging into aninwardly turned bead presenting a horizontal shoulder in turn merginginwardly and in a direction generally axially away from the respectiveraw metal edge into an outwardly and longitudinally flared and curvingwall portion finally merging into the main generally cylindrical body,:a closure at one end of the container body and having a central closureportion and a surrounding upstanding downwardly opening channel definedby an inner chuck wall connected with the central closure portionthrough a chuck radius and an outer seaming wall which is axially longerthan the chuck wall and the generally cylindrical end portion and whichis connected with the chuck wall through a channel radius, said centralclosure portion firmly resting on said shoulder about an annulus joiningwith the chuck wall through said chuck radius, with the seaming wallportion remote from the channel radius turned snugly under and lockedagainst the body shoulder in a manner holding said seaming wall intension and the closure firmly against said raw metal edge and on saidshoulder with the generally cylindrical body end portion tightlyembrace-d between the chuck wall and seaming wall and conforming inshape thereto and with the channel radius firmly engaged over the rawmetal edge.

8. Container structure as defined in claim 7 wherein the seaming wallportion remote from the channel radius carries a reinforcing hem whichis engaged in shape conforming closure locking contact under the bodyshoulder.

9. Container structure as defined in claim 7 wherein the seaming wallportion remote from the channel radius carries an inwardly turnedreinforcing hem which is engaged in shape conforming closure lockingcontact under the body shoulder.

10. Container structure as defined in claim 7 wherein the seaming wallportion remote from the channel radius carries an outwardly turnedreinforcing hem which is engaged in shape conforming closure lockingcontact under the body shoulder.

11. Container structure as defined in claim 9, there also being includeda seam sealing medium in the closure channel and engaging between theopposing faces of the generally cylindrical body portion the chuck walland the seaming wall.

12. Container structure as defined in claim 7 wherein the seaming wallportion remote from the channel radius carries a reinforcing hem whichis engaged in shape conforming closure locking contact under the bodyshoulder, and there also being included a seam sealing and bondingadhesive in the closure channel and providing a metal to metal bondbetween the generally cylindrical body portion and the chuck and seamingwalls between which it is embraced.

13. A metal closure for use on a metal container body devoid of an endflange, said closure comprising a central closure portion and asurrounding upstanding downwardly opening V-shaped channel defined by aninner chuck wall connected with the central closure portion through achuck radius and an outer seaming wall connected with the chuck wallthrough a channel radius dimensioned for receiving the fiangeless endextremity of a can body, said seaming wall being axially longer than thechuck wall and provided at its free edge extremity with an inwardlyturned reinforcing hem serving also as means for holding closures inspaced relation when they are nest stacked.

14. A metal closure for use on a metal container body devoid of an endflange, said closure comprising a central closure portion and asurrounding upstanding downwardly opening V-shaped channel defined by aninner chuck wall connected with the central closure portion through achuck radius and an outer seaming wall connected with the chuck wallthrough a channel radius dimensioned for receiving the fiangeless endextremity of a can body, said seaming wall being longer than the chuckwall and provided at its free edge extremity with an inwardly turnedreinforcing hem, and said channel being provided with a sealing mediumin and adjacent the channel radius in position for being out of contactwith a like closure nested in the closure with its seaming wall withinand in contact with the inwardly turned hem of the closure.

15. In a metal container, a generally cylindrical body having agenerally cylindrical end portion terminating endwise in a raw metaledge, said generally cylindrical portion merging into an inwardly turnedbead presenting a horizontal shoulder in turn merging inwardly and in adirection generally axially away from said raw metal edge and into anoutwardly and longitudinally flared and curving wall portion finallymerging into the main generally cylindrical body, a closure having acentral closure portion and a surrounding upstanding downwardly openingchannel defined by an inner chuck wall connected with the centralclosure portion through a chuck radius and an outer seaming wall whichis axially longer than the chuck wall and the generally cylindrical endportion and which is connected with the chuck wall through a channelradius, said central closure portion firmly resting on said shoulderabout an annulus joining with the chuck wall through said chuck radius,with the seaming wall portion remote from the channel radius turnedsnugly under and locked against the body shoulder in a manner holdingsaid seaming wall in tension and the closure firmly against said rawmetal edge and on said shoulder with the generally cylindrical body endportions tightly embraced between the chuck wall and seaming wall andconforming in shape thereto and with the channel radius firmly engagedover the raw metal edge, said container body being formed of metalhaving a thickness of 0.004 to 0.011 inch and of uniform thicknessthroughout the full circumference of its cross section, and the bodyportion intermediate the flares being uniformly and circumferentiallycorrugated.

16. In a metal container, a generally cylindrical body having at eachend thereof a generally cylindrical end portion terminating endwise in araw metal edge, each said generally cylindrical portion merging into aninwardly turned bead presenting a horizontal shoulder in turn merginginwardly and in a direction generally axially away from the respectiveraw metal edge into an outwardly and longitudinally flared and curvingwall portion finally merging into the main generally cylindrical body, aclosure at one end of the container body and having a central closureportion and a surrounding upstanding downwardly opening channel definedby an inner chuck Wall connected with the central closure portionthrough a chuck radius and an outer seaming wall which is axially longerthan the chuck Wall and the generally cylindrical end portion and whichis connected with the chuck wall through a channel radius, said centralclosure portion firmly resting on said shoulder about an annulus joiningwith the chuck wall through said chuck radius, with the seaming wallportion remote from the channel radius turned snugly under and lockedagainst the body shoulder in a manner holding said seaming wall intension and the closure firmly against said raw metal edge and on saidshoulder with the generally cylindrical body end portion tightlyembraced between the chuck wall and seaming wall and conforming in shapethereto and with the channel radius firmly engaged over the raw metaledge, said container body being formed of metal having a uniformthickness of 0.004 to 0.011 inch and being of uniform thicknessthroughout the full circumference of its cross section, the body portionintermediate the flares being uniformly and circumferentiallycorrugated.

References Cited by the Examiner UNITED STATES PATENTS 167,172 8/1875Herget 220-67 317,807 5/ 1885 Lauback 220-70 1,009,654 11/ 1911 Ducker22042 1,227,338 5/1917 Steffan 220 1,514,538 11/1924 Kronquest.1,719,153 7/1929 Wertz 220-67 1,770,163 7/1930 McCrery 22067 1,815,9707/1931 Eggerss. 1,886,803 11/1932 Giesler 220--67 X 2,522,401 9/1950Rava 22072 X 2,721,686 10/1955 Reifsnyder et al. 229-5.5 2,777,601 1/1957 Cheeley 229-5 16 2,856,102 10/1958 Remington et a1. 22067 X3,021,990 2/ 1962 Duskey 22067 X 3,172,317 3/1965 Blakeslee et a] 22067X FOREIGN PATENTS 623,368 7/1961 Canada.

476,980 12/1937 Great Britain.

891,341 3/1962 Great Britain.

THERON E. CONDON, Primary Examiner. JAMES R. GARRETT, Examiner.

1. IN A METAL CONTAINER, A GENERALLY CYLINDRICAL BODY HAVING A GENERALLYCYLINDRICAL END PORTION TERMINATING ENDWISE IN A RAW METAL EDGE SAIDGENERALLY CYLINDRICAL PORTION MERGING INTO AN INWARDLY TURNED BEADPRESENTING A HORIZONTAL SHOULDER IN TURN MERGING INWARDLY AND IN ADIRECTION GENERALLY AXIALLY AWAY FROM SAID RAW METAL EDGE AND INTO ANOUTWARDLY AND LONGITUDINALLY FLARED AND CURVING WALL PORTION FINALLYMERGING INTO THE MAIN GENERALLY CYLINDRICAL BODY, A CLOSURE HAVING ACENTRAL CLOSURE PORTION AND A SURROUNDING UPSTANDING DOWNWARDLY OPENINGCHANNEL DEFINED BY AN INNER CHUCK WALL CONNECTED WITH THE CENTRALCLOSURE PORTION THROUGH A CHUCK RADIUS AND AN OUTER SEAMING WALL WHICHIS AXIALLY LONGER THAN THE CHUCK WALL AND THE GENERALLY CYLINDRICAL ENDPORTION AND WHICH IS CONNECTED WITH THE CHUCK WALL THROUGH A CHANNELRADIUS, SAID CENTRAL CLOSURE PORTION FIRMLY REST-